feat: FASE 3 - Flusso MeasurementTec (selezione ricetta, esecuzione misure, riepilogo)

Implementazione completa del flusso operativo per il ruolo MeasurementTec:

Blueprint measure.py:
- select_recipe: selezione ricetta con ricerca e barcode
- task_list: lista task con conteggi subtask e allegati
- task_execute: esecuzione misure con numpad, calibro USB, feedback real-time
- task_complete: riepilogo con statistiche pass/fail e export CSV
- API AJAX: lookup-barcode, save-traceability, save-measurement
- Autorizzazione role_required("MeasurementTec") su tutte le route

Componenti riutilizzabili:
- numpad.html/js/css: tastierino numerico touch-friendly con keyboard support
- caliper_status.html + caliper.js: integrazione calibro USB via Web Serial API
- barcode_scanner.html + barcode.js: scansione barcode con html5-qrcode
- measurement_feedback.html: feedback visivo pass/warning/fail in tempo reale
- next_measurement.html: indicatore prossima misurazione
- annotation-viewer.js: visualizzatore canvas con marker su disegni tecnici
- csv-export.js: export CSV con locale italiano (delimitatore ;, decimale ,)

Sicurezza:
- Decoratore role_required(*roles) per autorizzazione basata su ruoli
- CSRF token su tutti i POST AJAX
- |tojson per prevenire XSS su annotations_json
- Validazione input lato client e server

i18n: 23+ nuove chiavi tradotte IT/EN per tutti i template FASE 3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/templates/components/numpad.html

@@ -0,0 +1,121 @@
+<!-- Numpad Component - Touch-friendly numeric keypad for measurement input -->
+<div
+  x-data="numpad()"
+  @keydown.window="handleKeydown($event)"
+  class="numpad-container w-full max-w-sm mx-auto"
+>
+  <!-- Value Display -->
+  <div class="value-display mb-3 p-4 bg-white dark:bg-slate-700 rounded-lg border-2 border-slate-200 dark:border-slate-600 shadow-sm">
+    <div class="flex items-baseline justify-center">
+      <span
+        x-text="displayValue || '0'"
+        class="font-mono text-3xl font-bold text-slate-900 dark:text-white"
+      ></span>
+      <span
+        x-text="unit"
+        class="ml-2 text-sm font-medium text-steel dark:text-steel-light"
+      ></span>
+    </div>
+  </div>
+
+  <!-- Keypad Grid 4x4 -->
+  <div class="grid grid-cols-4 gap-2">
+    <!-- Row 1: 7 8 9 ⌫ -->
+    <button
+      @click="addDigit('7')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >7</button>
+
+    <button
+      @click="addDigit('8')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >8</button>
+
+    <button
+      @click="addDigit('9')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >9</button>
+
+    <button
+      @click="backspace()"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-slate-100 dark:bg-slate-600 text-steel dark:text-steel-light hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >⌫</button>
+
+    <!-- Row 2: 4 5 6 C -->
+    <button
+      @click="addDigit('4')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >4</button>
+
+    <button
+      @click="addDigit('5')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >5</button>
+
+    <button
+      @click="addDigit('6')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >6</button>
+
+    <button
+      @click="clearAll()"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-slate-100 dark:bg-slate-600 text-measure-fail hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >C</button>
+
+    <!-- Row 3: 1 2 3 +/− -->
+    <button
+      @click="addDigit('1')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >1</button>
+
+    <button
+      @click="addDigit('2')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >2</button>
+
+    <button
+      @click="addDigit('3')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >3</button>
+
+    <button
+      @click="toggleSign()"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-slate-100 dark:bg-slate-600 text-steel dark:text-steel-light hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >+/−</button>
+
+    <!-- Row 4: 0 . (spacer) ✓ -->
+    <button
+      @click="addDigit('0')"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-white dark:bg-slate-700 text-slate-900 dark:text-white hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >0</button>
+
+    <button
+      @click="addDecimal()"
+      type="button"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-slate-200 dark:border-slate-600 bg-slate-100 dark:bg-slate-600 text-steel dark:text-steel-light hover:bg-slate-50 dark:hover:bg-slate-600 active:scale-95 active:bg-slate-100 dark:active:bg-slate-500 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50"
+    >.</button>
+
+    <!-- Spacer -->
+    <div></div>
+
+    <button
+      @click="confirm()"
+      type="button"
+      :disabled="!hasValue"
+      class="min-h-[56px] min-w-[56px] font-mono text-xl font-semibold rounded-xl border border-primary bg-primary text-white hover:bg-primary-dark active:scale-95 transition-all duration-150 select-none cursor-pointer flex items-center justify-center touch-manipulation focus:outline-none focus:ring-2 focus:ring-primary/50 disabled:opacity-40 disabled:cursor-not-allowed disabled:active:scale-100 disabled:hover:bg-primary"
+    >✓</button>
+  </div>
+</div>